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Siriraj Phototherapy lamp


 
 

Jirapaet K, M.D., M.P.H.* Jirapaet V, D.N.Sc.**
*Department of Pediatrics, Faculty of Medicine Siriraj Hospital,** Faculty of Nursing, Mahidol University, Bangkok 10700.

 
 
Abstract : Measurements of the Irradiance and the Effect on Environmental Temperature of the Siriraj Phototherapy Lamp
 
 
The Siriraj Phototherapy Lamp (SPL) was invented by the investigator to compensate for a similar, but expensive imported device and the low-efficiency locally-made device. The SPL irradiance and effect on environmental temperature were measured in this study. The device used six fluorescent bulbs of which zero to three were blue. The distance between the bulbs and the mattress was fully adjustable. The blue fluorescent bulb emitted a higher light intensity than the white. In both kinds of bulbs the intensity of light was higher in the centre of the bulbs than at the periphery. The light intensity varied proportionately with the number of blue fluorescent bulbs, but inversely with the distance between the bulbs and the mattress. Lining the SPL with a white cloth increased the light intensity. This inverse relationship was also found between the environmental temperature near the mattress and the distance. Placing a plastic shield under the SPL reduced the radiant heat emitted by the bulbs to the mattress which resulted in a decrease of environmental temperatures by 2.3 ° C and 3.0 ° C at the distances of 45 and 30 cm, respectively.
 
 
 
 
 
   
 
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Siriraj Radiant Warmer


 
 

Jirapaet K, M.D., M.P.H.* Jirapaet V, D.N.Sc.**
*Department of Pediatrics, Faculty of Medicine Siriraj Hospital,** Faculty of Nursing, Mahidol University, Bangkok 10700.

 
 
Abstract : Rewarming Hypothermic Infants with Siriraj Radiant Warmer Model-2.
 
 
The efficacy of the Siriraj Radiant Warmer Model-2, invented by the investigators for treating environmental hypothermia in newborn infants, was studied. Eleven healthy infants, with a mean birth weight of 2,570 + 433 g (range 1,910-3,040), mean age at study of 13.2 + 14.3 hours (range 1- 39), and mean pretreatment rectal temperature of 35.7 + 0.45 o C (range 35.0-36.5) were incubated for two hours in the nursery. The mean rectal temperature rose within 15 minutes of warming and remained within the normal range 45 minutes after treatment.
 
 
Eight sick infants, admitted to the newborn unit, with a mean body weight of 2,268 + 499 g (range 1,710-3,000) mean age at study of 10 + 5.5 days (range 21 hours-19 days), and mean pretreatment rectal temperature of 36.2 + 0.35 o C (range 35.7-36.6) were warmed for 48 hours. Within 4 hours of warming, the mean rectal temperature reached 37.0 o C and stabilized throughout the warming period in all infants but one, whose rectal temperature was 37.6 o C at the 32 nd hour. The Siriraj Radiant Warmer Model-2 can be safely used for rewarming hypothermic infants and stabilizing body temperature both in short-term and long-term warming.
 
 
 
 
 
 
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Contact Us
E-mail: kriangsak.jir@mahidol.ac.th
 
     
 
 
     
 

©Copyright 2001 Professor Kriangsak Jirapaet
Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University.Tel./Fax. 02-4182560

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